Polymer cell cylindrical battery
By designing the close connection between the conductive circular tubular shell and the polymer cylindrical battery cell, the problems of welding slag and fire during the welding process of traditional cylindrical batteries are solved, and a simpler assembly structure and higher production efficiency are achieved.
Patent Information
- Application Number
- CN202421249391.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-03
- Publication Date
- 2025-03-28
- Estimated Expiration
- 2034-06-03
AI Technical Summary
During the traditional manufacturing process of large cylindrical batteries, the electrode ears are welded to the adapter sheet, electrode cap or shell, which is prone to welding slag and fire, resulting in short circuits and self-discharge of the battery, increasing equipment investment and reducing production efficiency.
A polymer cell cylindrical battery is designed to achieve the conduction of the electrode ear through the tight connection between the conductive circular tube shell and the polymer cylindrical battery cell instead of the traditional welding method.
This solution avoids the quality risks and high cost problems during welding, simplifies the assembly structure of the battery, improves production efficiency, and reduces energy consumption.
Smart Images
Figure CN222690859U_ABST
Abstract
Description
Technical Field
[0001] The present disclosure relates to the field of battery technology, and in particular to a polymer cylindrical battery. Background Art
[0002] Cylindrical batteries are widely used in our daily lives, such as electric toys, remote controls, drones, etc. Traditional large cylindrical batteries are mostly manufactured using adapters, which are laser welded to the positive and negative pole ears and poles or shells of the winding core. Welding slag and even fire are easily generated during the welding process. Welding slag entering the winding core can easily cause the risk of short circuit and self-discharge of the battery winding core, resulting in an increase in product defective rate. This method will increase equipment investment, low production efficiency, and poor welding consistency. Laser welding consumes a lot of energy, which is not conducive to reducing production costs. Utility Model Content
[0003] The purpose of the present application is to propose a polymer battery cylindrical battery, in which the electrode ears of the battery structure do not need to be welded, thereby solving the problems caused by welding the electrode ears of the cylindrical battery with the adapter, electrode cap or shell in the prior art.
[0004] The technical solution of the utility model is a polymer battery cylindrical battery, comprising a tubular shell, the tubular shell is conductive; a polymer cylindrical battery, the polymer cylindrical battery comprises a positive electrode ear and a negative electrode ear, the positive electrode ear and the negative electrode ear are respectively led to the upper end and the lower end of the polymer cylindrical battery, as well as a conductive cap and an insulating pad.
[0005] Among them, the polymer cylindrical battery cell is integrally arranged in a tubular shell, the negative electrode ear is in close contact with the inner wall of the tubular shell, the conductive cap is pressed on the positive electrode ear without contacting the tubular shell, the insulating pad is pressed on the conductive cap, a through hole is provided in the center of the insulating pad to expose the conductive cap part, and the edge of the upper port of the tubular shell is turned inward to achieve the compression of the upper edge of the insulating pad.
[0006] Furthermore, the circular tubular shell is made of steel and is integrally stamped into a structure in which the lower end of the circular tubular shell is a closed bottom and the upper end is an open structure. The upper end of the circular tubular shell is turned inward by spinning.
[0007] Furthermore, the positive electrode ear and the negative electrode ear are in the shape of strips, the positive electrode ear is folded in a "z" shape on the upper end surface of the polymer cylindrical battery cell near the central area, and the negative electrode ear is folded in a "z" shape on the lower end surface of the polymer cylindrical battery cell, or folded in an "L" shape on the lower end surface and side of the polymer cylindrical battery cell.
[0008] Furthermore, the insulating pad is made of rubber or silicone rubber with a thickness of 1 to 2 mm. The conductive cap is in a boss shape. The boss size of the conductive cap matches the size of the through hole on the insulating pad, and the boss of the conductive cap is embedded in the through hole on the insulating pad.
[0009] The polymer battery cylindrical battery structure designed by the technical scheme adopts a polymer cylindrical battery, and the positive and negative ears of the polymer cylindrical battery are respectively at the upper and lower ends of the polymer cylindrical battery. When the polymer cylindrical battery is tightly fitted and plugged into the cylindrical shell through the conductive tubular shell, the negative ear of the polymer cylindrical battery is in close contact with the inner wall of the cylindrical shell, so as to conduct the negative electrode of the battery. A conductive cap is set on the positive ear, and an insulating pad with a through hole is pressed on the top of the conductive cap. The upper port of the cylindrical shell is turned inward by spinning, and the edge turned inward is pressed against the edge of the insulating pad and the upper edge of the polymer cylindrical battery, so as to realize the assembly of the polymer cylindrical battery, the conductive cap, and the insulating pad. The conductive cap is connected and closely contacts the positive ear to realize the conduction of the positive electrode of the battery. The conductive cap of the cylindrical battery of this scheme does not need to be laser welded, and the overall assembly structure is simpler, avoiding the quality risk and high cost caused by the need for welding. BRIEF DESCRIPTION OF THE DRAWINGS
[0010] Figure 1 It is a schematic diagram of the structural decomposition of the utility model.
[0011] Figure 2 This is a schematic diagram of an "L"-shaped negative electrode ear of a polymer cylindrical battery cell of the present invention.
[0012] Figure 3 It is a stereoscopic diagram of the overall structure of the utility model.
[0013] Figure 4 It is a cross-sectional structural diagram of the overall assembly structure of the utility model. DETAILED DESCRIPTION
[0014] The technical solutions in the embodiments of the present disclosure will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present disclosure, rather than all embodiments. Based on the embodiments of the present disclosure, all other embodiments obtained by ordinary technicians in this field without creative work also fall within the scope of protection of the present disclosure.
[0015] See also Figures 1 to 4, which is a specific embodiment of a polymer battery cell cylindrical battery provided by the present invention, the polymer battery cell cylindrical battery comprises a tubular shell 1, the tubular shell 1 is conductive; a polymer cylindrical battery cell 2, the polymer cylindrical battery cell 2 comprises a positive electrode ear 21 and a negative electrode ear 22, the positive electrode ear 21 and the negative electrode ear 22 are respectively led to the upper end and the lower end of the polymer cylindrical battery cell 2, as well as a conductive cap 3 and an insulating pad 4.
[0016] Among them, the polymer cylindrical battery cell 2 is integrally sleeved in the tubular shell 1, the negative electrode ear 22 is in close contact with the inner wall of the tubular shell 1, the conductive cap 3 is pressed on the positive electrode ear 21 and does not contact the tubular shell 1, the insulating pad 4 is pressed on the conductive cap 3, and a through hole 41 is provided in the center of the insulating pad 4 to expose part of the conductive cap 3, and the upper port edge a of the tubular shell 1 is turned inward to achieve the upper edge of the insulating pad 4 being pressed tightly.
[0017] Furthermore, the circular tubular shell 1 is made of steel and is formed by integral stamping so that the lower end of the circular tubular shell 1 is a closed bottom and the upper end is an open structure. The upper port of the circular tubular shell 1 is turned inward by spinning to press the upper edge of the insulating pad 4.
[0018] Reference Figure 1 , Figure 2 , further, the positive ear 21 and the negative ear 22 are in the shape of a strip, the positive ear 21 is folded in a "z" shape on the upper end face of the polymer cylindrical battery 2 near the central area, and the negative ear 22 is folded in a "z" shape on the lower end face of the polymer cylindrical battery 2, or folded in an "L" shape on the lower end face and side of the polymer cylindrical battery 2. Through the "z"-shaped folding of the positive ear 21, the positive ear 21 has an elastic thickness that can better contact with the conductive cap 3. Similarly, the "z"-shaped folding of the negative ear 22 forms an elastic thickness that better contacts the closed bottom of the tubular shell. As for the negative ear 22 being folded in an "L" shape on the lower end face and side of the polymer cylindrical battery 2, the polymer cylindrical battery 2 is tightly arranged in the tubular shell 1, and the outer wall of the polymer cylindrical battery 2 is tightly abutted against the inner wall of the tubular shell 1, so that the negative ear 22 is in close contact with the inner wall of the tubular shell 1.
[0019] Furthermore, the insulating pad 4 is made of rubber or silicone rubber with a thickness of 1 to 2 mm. The conductive cap 3 is in a boss shape. The boss surface of the conductive cap 3 is matched with the size of the through hole 41 on the insulating pad 4, and the boss surface of the conductive cap 3 is embedded in the through hole 41 on the insulating pad 4.
[0020] Reference Figure 1 , Figure 3 , Figure 4In this scheme, the upper port of the circular tubular shell 1 is flanging inwards by spinning. Spinning is to fix a flat plate or hollow blank on the mold of a spinning machine. While the blank rotates with the main axis of the machine tool, a rotating wheel or a driving rod is used to pressurize the blank to cause local plastic deformation. The spinning method can be used to complete processes such as drawing, flanging, shrinking, bulging and curling of rotating bodies of various shapes. The edge of the insulating pad 4 is pressed against the edge of the upper port of the circular tubular shell 1, and the insulating pad 4 presses the conductive cap 3, so that the conductive cap 3 is in close contact with the positive ear 21. At the same time, the polymer cylindrical battery 2 is assembled into the circular tubular shell 1, and the entire assembly process does not require welding.
[0021] The embodiments of the present disclosure have been described above, and the above description is exemplary, not exhaustive, and is not limited to the disclosed embodiments. Many modifications and changes will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments. The selection of terms used herein is intended to best explain the principles of the embodiments, practical applications, or improvements to the technology in the market, or to enable other persons of ordinary skill in the art to understand the embodiments disclosed herein.
Claims
1. A polymer cylindrical battery, characterized in that: include: A circular tubular housing (1), wherein the circular tubular housing (1) is conductive; A polymer cylindrical battery cell (2), the polymer cylindrical battery cell (2) comprising a positive electrode ear (21) and a negative electrode ear (22), the positive electrode ear (21) and the negative electrode ear (22) being led out to the upper end and the lower end of the polymer cylindrical battery cell (2), respectively; and Conductive cap (3) and insulating pad (4); The polymer cylindrical battery cell (2) is integrally sleeved in a circular tubular shell (1), the negative electrode ear (22) is in close contact with the inner wall of the circular tubular shell (1), the conductive cap (3) is pressed on the positive electrode ear (21) and does not contact the circular tubular shell (1), the insulating pad (4) is pressed on the conductive cap (3), a through hole (41) is provided in the center of the insulating pad (4) for exposing a portion of the conductive cap (3), and the upper port edge (a) of the circular tubular shell (1) is turned inward to achieve pressing the upper edge of the insulating pad (4).
2. The polymer cylindrical battery according to claim 1, characterized in that: The circular tubular shell (1) is made of steel and is formed by integral stamping into a structure in which the lower end of the circular tubular shell (1) is a closed bottom and the upper end is an open structure. The upper end of the circular tubular shell (1) is turned inward by spinning to press the upper edge of the upper end (a) of the insulating pad (4).
3. The polymer cylindrical battery according to claim 1, characterized in that: The positive electrode ear (21) and the negative electrode ear (22) are in the shape of strips. The positive electrode ear (21) is folded in a "z" shape on the upper end surface of the polymer cylindrical battery cell (2) near the central area, and the negative electrode ear (22) is folded in a "z" shape on the lower end surface of the polymer cylindrical battery cell (2), or in an "L" shape on the lower end surface and side surface of the polymer cylindrical battery cell (2).
4. The polymer core cylindrical battery according to claim 1, characterized in that: The insulating pad (4) is made of rubber or silicone rubber and has a thickness of 1 to 2 mm. The conductive cap (3) is in the shape of a boss. The size of the boss surface of the conductive cap (3) matches the size of the through hole (41) on the insulating pad (4). The boss surface of the conductive cap (3) is embedded in the through hole (41) on the insulating pad (4).